WAC 296-96-02575
How do we enforce hoistway
pressurization? Pressurization requirements. Elevator
hoistways shall be pressurized to maintain a minimum positive
pressure of 0.10 inches of water column with respect to
adjacent occupied space on all floors and a maximum pressure
so as to not prevent the automatic operation of the elevator
doors, as well as accounting for the stack and wind effect
expected on the mean low temperature January day. This
pressure shall be measured at the midpoint of each hoistway
door, with all hoistway doors open at the designated primary
recall level and all other hoistway doors closed. The supply
air intake shall be from an outside, uncontaminated source
located a minimum distance of twenty feet from any air exhaust
system or outlet.
(1) Elevator doors. Each elevator door shall operate
properly when hoistway pressurization is in effect.
(2) Hoistway venting. Hoistway venting required by
Section 3004 need not be provided for pressurized elevator
shafts.
(3) Machine rooms. Elevator machine rooms shall be
pressurized in accordance with this section unless separated
from the hoistway shaft by construction in accordance with the
International Building Code, Section 707.
(4) Special inspection. Special inspection for
performance shall be required in accordance with the
International Building Code, Section 909.18.8. System
acceptance shall be in accordance with the International
Building Code, Section 909.19.
(a) The elevator department must observe the operation of
the doors and insure proper documentation and tags are on
site.
(b) Devices shall have an approved identifying tag or
mark on them consistent with the other required documentation
and shall be dated indicating the last time they were
successfully tested and by whom.
EXEMPTION:
Special purpose and residential elevators are exempt from this section.